yade-dev team mailing list archive

[Anton Gladky <gladky.anton@xxxxxxxxx>]

Hi, Vaclav!

Thank you for fixing that. I have also found 2 days ago the difference
between Eigen and WM3 in my simulations, but, sorry, did not find the
reason.
I also need to solve the problem with clumps. Still have not found the
source of problems.
But I can only continue that work on April, when I return back to Germany.

Anyway, I also hope that Eigen migration will bring benefit :)

Thanks for help!
______________________________

Anton Gladkyy


2010/3/20 Václav Šmilauer <eudoxos@xxxxxxxx>

> > Hi Vaclav, thanks for suggestion, it seems, I have fixed it.
> Hi, what I suggested was wrong, as I saw from results of
> examples/concrete/uniax.py. I fixed that in the last commit. The results
> seem to be the same. There are still some things to wrap in python, run
> scripts/regression-tests.py, but I take care of that.
>
> The uniax.py simulation runs about 10x slower with eigen, probably due
> to lots of construction/descruction of temporary objects.
>
> Please test some of your simulations as well, then we will ask people to
> test theirs.
>
> Once this is done, we might either migrate yade code to eigen, or (which
> would be smoother and would let us compare performance), first
> progressively adapt miniWm3 interface to plain eigen (without our
> wrapper types) by adding extra methods, then changing sources of yade.
> We would create a few extra functions for things that have no direct
> correspondence in eigen, or ask upstream for including those.
>
> Long way ahead, but with solid basis of nice work of yours, it will be
> feasible, I think.
>
> Cheers, Vaclav
>
>
> >
> > When I ran some tests with old variant and a new one (with null-vector
> > checks), I got a little bit different results with regular-hexa. Does
> > it mean, that in some cases geometry was wrongly calculated
> > previously?
> >
> >
> > 2010/3/15 <noreply@xxxxxxxxxxxxx>
> >         ------------------------------------------------------------
> >         revno: 2079
> >         committer: Anton Gladky <gladky.anton@xxxxxxxxx>
> >         branch nick: trunk
> >         timestamp: Mon 2010-03-15 12:24:35 +0100
> >         message:
> >          Previous commit correction. Thanks to Vaclav.
> >         modified:
> >
>  pkg/dem/DataClass/InteractionGeometry/Dem3DofGeom_SphereSphere.cpp
> >
> >
> >         --
> >         lp:yade
> >         https://code.launchpad.net/~yade-dev/yade/trunk<https://code.launchpad.net/%7Eyade-dev/yade/trunk>
> >
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> >
> https://code.launchpad.net/~yade-dev/yade/trunk/+edit-subscription<https://code.launchpad.net/%7Eyade-dev/yade/trunk/+edit-subscription>
> .
> >
> >         === modified file
> >
> 'pkg/dem/DataClass/InteractionGeometry/Dem3DofGeom_SphereSphere.cpp'
> >         ---
> >
> pkg/dem/DataClass/InteractionGeometry/Dem3DofGeom_SphereSphere.cpp
>  2010-03-12 21:20:32 +0000
> >         +++
> >
> pkg/dem/DataClass/InteractionGeometry/Dem3DofGeom_SphereSphere.cpp
>  2010-03-15 11:24:35 +0000
> >         @@ -45,9 +45,10 @@
> >                        Vector3r axis=planeNormal.Cross(planePt);
> >         axis.Normalize();
> >                        Real angle=planePt.Length()/radius;
> >                        normal2pt.FromAxisAngle(axis,angle);
> >         +               Quaternionr ret; return
> >         ret.Align(Vector3r::UNIT_X,normal2pt*planeNormal);
> >         +       } else {
> >         +               return Quaternionr::IDENTITY;
> >                }
> >         -       Quaternionr ret;
> >         ret.Align(Vector3r::UNIT_X,normal2pt*planeNormal);
> >         -       return ret;
> >          }
> >
> >
> >
> >
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